Wire-holder for electric welding



A. SCHNEIDER.

WIRE HOLDER FOR ELECTRIC WELDING.

APPLICATION FILED MAY23.\919.

1,316,334. PatentedSept. 16,1919.

ADOLF SCHNEIDER, OF BROOKLYN, NEW YORK.

WIRE-HOLDER FOR ELECTRIC WELDING.

Specification of Letters ratent.

Patented Sept. 16, 1919.

Application filed Kay 28, 1919. Serial No. 800,389.

To all whom it may concern:

Be it known that I, ADOLF SCHNEIDER, a

citizen of the United States, residing in the city of New York, boroughof Brooklyn, in the county of Kings and State of New York, have inventeda certain new and useful Improvement in Wire-Holders for ElectricWelding, of which the following is a specification.

- The invention relates to devices for holding and presenting the wireto be fused in electric welding operations, and the object of theinvention is to provide a tool in which the wire is reliably heldwithout springs, until intentionally released, and in which the angulardirection of the wire relatively to the tool may be varied while thusclamped.

Another object is to provide means for holding the cables securely andinsuring the desired transmission of current to and through the wire.

A further object is to provide for cooling the tool and avoiding thedanger of contact between the hand of the operator and the electrodebars or conductors.

The invention consists in certain novel features and details ofconstruction and arrangement by which the above objects are attained, tobe hereinafter described and g claimed.

The accom anying drawings form a part of this speci cation and show anapproved form of the invention. Fi re 1 is a side elevation of the toolwith a. wire held therein.

Fi 2 is a longitudinal section taken on the line 22 in Fig. 1, andpartly in elevation.

Fig. 3 is an elevation showing one of the electrode bars, seen at aright angle to Fig. 1, with the insulating shell therefor shown inlongitudinal section. The companion electrode bar and its shell is shownin dotted lines.

Fig. 4 is a transverse section of the tool, taken on the line H in Fig.1..

Fig. 5 is an elevation of one of the electrode bars alone, showing itsplane inner face.

Similar letters of reference indicate the same parts in all the figures.

A and B are bars of bronze forming the electrode, joined at the lowerends by a single screw C, having the r inner-adjacent faces planethroughout the main portions of their length and held yieldinglyslightly separated along such faces by the screw C.

The bar A has a laterally extended head A rounded on its upper face asat a, carrying at its outer end an upwardly extended flange or lug Aoffset from the bar, and the bar B has a similar but oppositely arrangedhead B similarly rounded as at b and provided with a correspondinglyoffset lug B The lugs A B are notched oppositely on thelr under sides asat a b to receive the rounded upper faces of the heads A B and thusmterlock the upper ends of the bars and hold them in slidable engagementpermitting the adjacent faces of the lugs A B to move toward and fromeach other, and as the lug of the bar A, shown at the left in Fig. 2, isoffset the right, and the lug of the bar B oppositely placed, the springor set of the bars due to the action of the screw C tends to draw thelugs toward each other by the separation of the bars, and clamp any obect between the lugs. By compresslon 0n the bars in the direction toforce their plane faces together, the lugs are forced apart and willrelease such object.

The lug B is bored to receive a pintle D on a disk D having a transverseangular goove across its inner face, and the lug 2 1s bored to receive arivet E extending through a plate or distance-piece E. Theseparts arealso of bronze to insure the desired conductivity.

The wire end to be fused is laid in the groove d by compressing the barstogether, and is held frictionally between the disk D and distance-pieceE by the set of the bars when the latter are released, in contact withsuch disk and distance-piece across the entire face of each, thusinsuring the required transmission of current, and the wire may bedirected at. any desired angle relatively to the bars by turning it,with the disk D, on the lug B with the pintle D as a center.

To impartea further degree of resiliency without lessenin the area ofcontact in'thus turning the dis D, the inner face of the lug l3 andadjacent face of the disk D are recessed concentricall to the pintle D,as at b and (F, to receive an annular gasket or cushion F of braided orinterlaced copper or bronze wire serving to separate slightly t f ces ofthe lug and disk and insure complete contact through the cushion over alarge area between such lug and disk in all positions of the latter.

At the lower end of each bar A and B are tapered grooves or sockets asat 9 receiving the oppositely tapered soldered ends G of the cables G,both of which supply current to the bars. The upper ends of the socketsare larger than the lower and the ends G are correspondingly shaped andhe half in each bar securely clamped in place by the screw 0.

The back or outer face of each bar A and B is grooved or covedlongitudinally as at a b, see Fig. 4, leaving a central rib A B and eachbar is inclosed in a semlcyhndrical shell H of thick insulating materialof any suitable composition extending from a short distance above thescrew C nearly to the heads A B and adapted to be grasped both togetherin the hand of the operator. I

The ends of the cables adjacent the lower ends of the bars are coveredwith insulation as at G extending as far down as may be required toavoid accidental contact.

The semicylindrical shells H are secured to the bars by lender rivets Jhaving the1r heads set well below the exterior sur ace of the shells,and the latter are provlded each with two series of perforations hextending from the exterior to the interior spaces formed by thelongitudinal coves a 6 to permit a circulation of air about the bars,the latter are also notched along the margins as at a b to facilitatesuch circulation and lessen the dan er of overheating.

The two cales and bars form a single electrode through which the currentpasses to the wire M fusing the latter as usual in the weldingoperation.

The distance-piece E- may be removed by forcing out the rivet E which isdesigned to 'be thus driven when required, and replaced by adistance-piece of greater or less thickness adapted to serve with a wireof corresponding diameter, or the distancepiece may be omitted inconditioning the tool for service with a very large wire. The tool asshown is designed to serve with ourrentsof about 150 amperes.

The tool holds the wire reliably while permitting it to be presented atany desired angle, the cables are positively engaged, the

anger of contact of the hand with the electrode bars is reduced to aminimum, and the provisions for the circulation of air around theelectrode bars lessens the danger of overheatin It Wlll be noted that nospring is required, the screw C servin to hold the bars yieldlnglyseparated wit the required de of resilience and at the same timeclamping the cables G positively to the bars.

I claim 1 TWO electrode b each having 9. lug

at one end ofi'set out of the plane of the bar, adapted to grasp a wirebetween said lugs, and means for joining said bars together at theirother ends.

2. Two electrode bars, each having a lug at one end ofiset out of theplane of the bar, adapted to grasp a wire between said lugs, means atthe other ends of said bars for joining the latter together and holdingsaid bars yieldingly separated, and an insulating shell on each of saidbars.

3. Two electrode bars, each having a lug at one end offset out of theplane of the bar, adapted to grasp a wire between said lugs, a screwjoining said bars together at their other ends and holding said barsyieldingly separated, and an insulating shell on each of said bars.

4. Two electrode bars, each having a head and a In thereon at one endofiset out of the plane 0 the 'bar, adapted to grasp a wire between saidlugs, each of said lugs having a notch adapted to receive the head ofthe opposite bar and slidably interlock said bars, and means at theother ends of said bars for joining the latter and holding themyieldingly separated.

5. Two electrode bars, each having an offset lug at one end, adapted tograsp a wire between said lugs, means at the other ends of said bars forjoining the latter and holding them yieldingly separated, and a diskrotatably mounted on one of said lugs and having a groove across itsface, adapted to receive such wire.

6. Two electrode 'bars, each having an offset lug at one end, adapted togras a wire between said lugs, means at the ot er ends of said bars forjoining the latter and holding them yieldingly separated, a diskrotata'bly mounted on one of said lugs and having a groove across itsface, and a cushion of conducting material between said disk and lug.

7 Two electrode bars, each having an oil'- set lug at one end, adaptedto grasp a wire between said lugs, means at the other ends of said barsfor joining the latter and holding them yieldingly separated, a diskrotatably mounted on one of said lugs and having a groove across itsface, annular recesses in t e adjacent faces of said disk and ts lug,and an annular cushion of conducting material in said recesses.

8. Two electrode bars, each having an offset lug at one end adapted tograsp a wire between said lugs, means at the other ends of said bars forjoining the latter and holding them yieldingly separated, and a Iremovable distance-piece on one of said lugs.

9. Two electrode bars, each having an ofi'- set lug at one end adaptedto gras a wire between said lugs, means at the ot er ends of said barsfor joining the latter and holdng them yieldingly separated, a disk lotatably mounted on one of said lugs and having a groove across its faceadapted to receive such Wire, and a distance-piece removabl mounted onthe other of said lugs.

10. W0 electrode bars, each having an offset lug at one end ada ted tograsp a wire between said lugs, soc ets formed partly in each of theother ends of said bars, adapted to receive the ends of cables, a screwin such other ends serving the double function of joining said barstogether at such other ends and holding said bars yieldingly separated,and clamping said cable ends in said sockets.

11. Two electrode bars, each having an offset lug at one end adapted tograsp a wire between said lugs, sockets formed partly in each of theother ends of said bars, adapted to receive the ends of cables andshaped to prevent the withdrawal of the latter, a screw in such otherends serving the double function of joining said bars together at suchother ends and holding said bars {'ieldingly separated, and clampingsaid cab e ends in said sockets.

12. An electrode bar having its rear face rooved along its margin, and asemicylinrical insulating shell inclosing such rear face and havingperforations communicating from the exterior of said shell to saidgrooves.

13. An electrode b'ar having its rear face grooved along its margins andhavi notches in such margins, and a semicylindrical insulating shellinclosing such rear face and having perforations communicatin from theexterior of said shell to sai grooves and notches.

In testimony that I claim the invention above set forth I aflix mysignature.

ADOLF SCHNEIDER.

